Electrical Data - Resol Grundfos Direct Sensors VFS Manuel Pour Le Technicien Habilité

VFS
Temperature
Measuring range: 0 ... 100 °C
Accuracy: +/- 2 °C
Accuracy at 25 ... 80 °C: +/- 1 °C
Response time (63.2 %): ca. 0.25 s
Resolution: 0.4 °C
Flow rate
Measuring range in water (0 ...
100 °C),
in Tyfocor LS (30 ... 100 °C)
®
Accuracy (0 ... 100 °C)
Response time (63.2 %)
Resolution
Flow rate signal

Electrical data

Power supply
Power consumption
Output signals
Temperature signal
Load impedance
11
VFS 1 - 12 l VFS 2 - 40 l
1 - 12 l/min 2 - 40 l/min
1.5 ... 5.0 % 1.5 ... 5.0 %
(typically 3 %) (typically 3 %)
< 3s < 1s
0.06 l/min 0.2 l/min
0.5 ... 3.5 V 0.5 ... 3.5 V
(0 l/min at 0.25 V) (0 l/min at 0.25 V)
VFS
⎓
+5 V
< 50 mW
Ratiometric
0.5 ... 3.5 V
> 10 kΩ
4.0
VFS 1 - 12 l
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0 10 20
Flow rate (l/min)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0 20 40 60
Temperature (°C)
400
350
300
250
VFS 1-12 l
200
150
100
50
0
0 5 10 15 20 25
Flow rate (l/min)
VFS 2 - 40 l
30 40
80 100
VFS 2-40 l
30 35 40